I have a hollow base mold for the 45 muzzleloader. Wondered about it in the 45-70? Maybe at the low velocity for a suppressed marlin turn it around, cavity forward, powdercoat and use TB for the load. 100 yards or less I'm guessing. May or may not stabilize. I have had too may projects to get to this one.

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy. Its inherent virtue is the equal sharing of misery. Winston Churchill.